Inking roller



Oct. 27, 1931. H. c. SCHROEDER nixme ROLLER Filed March 12. 1928 3Sheets-Sheet 1 INVENTOR.

Uct. 27, 1931. H. c. SCHROEDER 1,829,189

INKING ROLLER Filed March 12, 1928 3 Sheets-Sheet 2 I \Q Q ATTO MEY Oct.27, 1931. c SCHROEDER 1,829,189

INKING ROLLER Filed March 12, 1928 3 Sheets-Sheet 3 INVENTOR.

I AT RNEY construction,

Patented Get. 27, 1931 UNITED STATES PATENT OFFICE HANS C. SGHROEDER, OFLA GRANGE, ILLINOIS, ASSIGNOR 'IO GOSS PRINTING PRESS CQMPANY, ACORPORATION OF ILLINOIS ROLLER has wider uses where similar conditionsand re uirements exist.

bjects and advantages of the invention will be set forth in parthereinafter and in art will be obvious herefrom, or may be 10 earned bypractice with the invention, the

same being realized and attained by means of the instrumentalities andcombinations pointed out in the ap ended claims.

The invention consists in the novel parts, arran ements, combinationsand improvements erein' shown and described.

The accompanyin drawings, .referred to herein and constituting a parthereof, illustrate one embodiment of the invention, and

together with the description, serve to explain the principles of theinvention.

Of the drawings Fig. 1 is an elevation of an inking roller embodying theinvention;

Fig. 2 is a fragmentary, longitudinal section, on an enlarged scale,corresponding to the left-hand end of Fig. 1;

Fig. 3 is a fragmentary, sectional view showing the invention embodiedin a vibrating ink roller;

Fig. 4 is a full transverse section on line 4-4 of Fig. 3;

Fig. 5 is a fragmentary elevation of a mod- 5 ified form of bearingmechanism; and

Fig. 6 is an enlarged transverse section on line 66 of Fig. 5.

The invention is directed principally to providing a construction forinking rollers of printing presses and the like wherein requisite ordesirable relative lightness of structure, togetherwith great rigidityand uniformity of structure are required, and exact and uniform surfacecontact over the entire 5 exterior cylindrical surface of the roller arepresses wherein a very high class of printing is required together withthe highest s eed consistent with such quality is very difiibult andexactin Modern resses are of great width, and t e inking rol ers can besupported only at their ends, and the permissible or ossible weight ofthe rollers is very definitey restricted. It is therefore essential tosecure a structure havin the requisite degree of lightness, and whic atthe same time is extremely rigid so that there is no flexure orvariation in the length of the roller, and especially no tendencytowards sagging, even in the central part thereof. That 15, the inkdistributing and applying action must be exactly uniform over the entirecylindrical inking surface of the roller. In carrying out the mainpurposes of the invention also, it is desirable to provide a roller ofhollow cylindrical form mounted by ball bearings upon a stationarytubular shaft, which shaft is provided of such form as to provide thegreatest degree of rigidity possible with the amount of materialempioyed, and also to provide room for the arings upon the exteriorthereof.

The invention as embodied, broadly comprises a hollow inner supportingmember which is medianly of maximum diameter and is diminished outwardlytoward either end, taperingly or otherwise. The median portion of thissupport is within the cylindrical rotatable roller member, and ballbearings are interposed between the rotatable roller and the innerportions of the decreased ends of the support. Thus in the median,unsupported structure the materials are disposed so as to provide themaximum rigidity and resistance to distortion. In the relatively smallends of the supporting member are mounted pintles, which provide strongand compact bearings for the entire structure.

The foregoing general description, and the following detaileddescription as well, are illustrative and exemplary of the invention,but are not restrictive thereof in so far as it is novel.

The accompanying drawings illustrate, by way of example, the presentpreferred embodiment of the invention, which realizes the advantagesdescribed. The central or non-rotating supporting part of the roller,which may e conveniently termed the shaft, comprises a centralcylindrical portion 1. This central portion is preferably of very largediameter so as to provide the greatest resistance possible againstsagging, .flexure orother distortion in the central portion of v therelatively long reach of the roller, and

with this in view this tubular portion 1 occupies most of the interiorspace within the enclosing rotatable tubular roller structure. Towardeither end thereof, beginnin within the outer, rotatable tubular mem r,the tubular shaft 1 is tapered gradually decreasingly outwardly,although not necessarily regularly, as shown at 5, and terminates ateither end in'portions 6 of least diameter.

To provide strong and compact supporting portions at the extreme ends ofthe roller structure, there are fitted into the interior of therespective ends 6 of this shaft or supporting structure two solidpintles 0r shaft ends7,

which form a tight fit therewithin. Each pintle 7 is provided with aprojecting shouldered collar .8, which fits snugly against the outer endof the reduced end 6 of the tubular shaft'l. The pintles? havecylindrical. exterior end portions 9, which may be shaped and otherwiseadapted for any kind of support desired. The exterior of the rotatableroller member 13 is usually covered with a composition or materialsuitable for inking,

or such other ues as the roller may have.

' Therotatable roller body comprises a hollow cylinder 13, enclosing theenlarged central portion 1 of the supporting shaft or structure, and ateither end thereof the roller is rotatably mounted on a ball bearing,which bearing is mounted onthe reduced portion 5 of the tubular shaft.'As exemplarily embodied, a retaining thrust ring 14 is snug- 1y fittedagainst a shoulder 15 formed on the interior of the roller 13, and aball or race ring'16 is fitted snugly Within the-roller 13 and againstthe thrust ring 14. An interior ball race ring 17 is fitted against anexterior shoulder 18 formed on the exterior of the tapered portion 5 ofthe inner tubular shaft, and suitable balls 19 are interposed betweenthe two ball rings in a customary manner.

An exterior retaining ring 20 is tightly fitted against the exteriorside of the ball ring 16, and a flat,'apertured annular cap plate 21fits over the ball race, abuts closely on the end of the tubular roller13, and closely encircles the I portion 5 of the tubular shaft. Thisretaining plate is held in position in any manner desired, as forinstance as by a clamping screw 22. A felt Washer 23 may be employed asa lubricant retaining device within the cap plate.

In Figs. 3 and 4 the invention is shown applied to a vibrating inkingroller. I11 this form the anti-friction bearings between the tubularsupporting core and "the rotatable naaam ber 33 by suitable means, suchas a bolt and slot connection 34. The pintle 9" is preferably providedwith a bushing 35 within the supporting member 32.

For, the purpose of effecting light and easy longitudinal reciprocationor vibration of the roller, means for'longitudinally reciprocating orvibrating the inking roller, comprises a collar 36 fixed on the shaft 9by any suitable means, such as a clamping screw 37 threaded into thecollar and engaging the shaft. The collar 36 is provided with anexternal annular cam groove 38. Into this groove projects a pin 39 fixedon an arm 40 of a vibrating lever 41, which lever is pivotally mountedat42, on any suitable part of the machine frame. The lever 41 is rocked ina known manner through a slight arc of movement by any known or suitablemechanism. There is thereby imparted a slight lonshaft 9 conjointly withthe longitudinal vibration already described. In the embodied form ofsaid means, a pin 43 is fixed in the collar 36 and projects into a camgroove 44, formed in a curved extension plate 64, which is preferablyintegral with the supporting member 32. To insure the short rotaryreciprocatory movement being imparted to the shaft 9 and the support 1,there is preferably provided a key 45 between the shaft 9* and thecollar 36. The bearing is preferably a split bearing, and the upper part46 may be hinged at one side at 47 and have a lock nut 48 at the otherside. Thus the roller is readily removable and replaceable in itsbearings.

In Figs. 5 and 6 a modified form of antifriction bearing is provided,wherein the shaft of the roller is not partially rotated during itsreciprocatory movement, but rcciprocates without turning in ananti-friction hearing at either end of the shaft. As embodied, the lowerhalf 49 of the split bearing is provided with two anti-friction rollers53 and 54, journaled in the half-bearing 49, the rollers being curved toconform to the shaft as shown in Fig. 6 and with their axesperpendicular to shaft 9*. Two like anti-friction rollers 55 and 56 aresimilarly journalcd in the upper hinged half 46 of the hearing. The fourrollers are in contact with the reciprocable shaft 9*, but otherwise thebearing is out of contact with the shaft. This constitutes an anti-wearhearing which carries the reciprocatory pressure of the shaft.

It will be clear, of course, that with this hearing, and more especiallywith the form shown in Figs. 3 and 4, a partial rotation,

. either reciprocatory or uni-directional, is imparted from time to timeto the shaft 9, thereby decreasing the resistance to the endwisereciprocatory movement, or vibration, of the roller. At the same timesuch a mounting serves also to distribute any possible wear. This islikewise true with respect to the other forms shown. With the mechanismshown in Figs. 3 and 4, if desired, an angular change of position may bereadily effected by unscrewing and rescrewing the clamping screw 37.

The invention in its broader aspects is not limited to the specificmechanisms shown and described but departures may be made therefromwithin the scope of the accompanying claims without departing from theprinciples of the invention and without sacrificing its chiefadvantages.

What I claim is 1. An inking roller or the like including in combinationan inner stationary tubular supporting member having its median portionof maximum diameter and its ends decreasing outwardly, a tubular rollermedianly enclosing said supporting member, ball bearings mounted on saiddecreased tubular parts of the supporting member and within the ends ofthe tubular roller, and solid pintles fitted within and projecting fromthe hollow ends of said supporting member.

2. An inking roller or the like including in combination an innerstationary tubular supporting member having its median por tion ofmaximum diameter and its ends decreasing outwardly, a tubular rollermedianly enclosing said supporting member, ball bearings mounted on saiddecreased tubular parts of the supporting member and within the ends ofthe tubular roller, and solid supporting members fixed to the diminishedends of said supporting member.

3. An inking roller or the like including in combination an innerstationary tubular supporting member having its median portion ofmaximum diameter and its ends gradually decreasing outwardly, a tubularroller medianly enclosing said supporting member, and ball bearingsmounted on said decreased tubular parts of the supporting member andwithin the ends of the tubular roller.

4. An inking roller including a tubular supporting member having arelatively large diameter in a median portion and a lesser diameter nearthe ends, a tubular member enclosing the median portion and havinganti-friction hearings on said portions of lesser diameter.

5. An inking roller including in combina-- tion an inner tubularsupporting member, a tubular roller medianly enclosing said suportingmember, and anti-friction thrust bearings therebetween, said supportingmember having its median portion between said bearin s enlarged andsubstantially filling the hol ow portion of the roller.

6. An inking roller including in combination an inner integral tubularsupporting HANS C. SGHROEDER.

